Joe is 20 years old. His sister is half his age less 7. How old is his sister?
1 answer:
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Answer:
x is 1/3 and -1/3
Step-by-step explanation:
I graphed the function and found that when I plugged in 1/3 and -1/3 for x, the answer was 0.
<u>Given</u>:
The height of the bird at time t is given by the function
We need to determine the time it takes the worm to be eaten by the bird.
<u>Time taken:</u>
The time can be determined by substituting h(t) = 0 in the function.
Thus, we have;
Switch sides, we get;
Let us solve the equation using the quadratic formula.
Thus, we get;
Simplifying, we get;
The values of t are given by
and
and
and
Since, the value of t cannot be negative, then
Thus, the time taken by the bird to eat the worm is seconds.
Hence, Option B is the correct answer.